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Aggregate · 08.04

20mm Blue Metal

A striking deep blue-grey aggregate for pathways, driveways and garden beds. Durable, weather resistant and generous in coverage.

  • 20mm
  • Crushed rock
  • Deep blue-grey
  • Sold per m³
20mm Blue Metal supplied in bulk by Bulk Landscape Supplies Brisbane
Natural product. As our products come from natural sources, they may slightly differ in colour, shape and size. Website images are a guide only.

Quick answer

20mm Blue Metal is a crushed rock aggregate in a deep blue-grey colour. It improves drainage by preventing waterlogging and soil erosion, stands up to vehicles and walking, and helps control weeds. It suits garden pathways, driveways, garden beds and larger commercial landscaping. Lay about 50–75mm deep.

20mm Blue Metal at a glance
Size20mm
MaterialCrushed rock
ColourDeep blue-grey
Sold byThe cubic metre
Typical depthAbout 50–75mm
CoverageAbout 13–20 m² per m³
Approx. weightAbout 1.5 tonnes per m³

Coverage and weight are approximate. Check your area with the volume calculator.

Why choose it

Best features

  • 01Improves garden drainage by preventing waterlogging and soil erosion
  • 02Durable for vehicles and walking
  • 03Weed control for garden beds and walkways
  • 04Weather resistant
  • 0520mm size offers excellent coverage

Where to use it

Versatile applications

  • 01Garden pathways
  • 02Driveways
  • 03Garden beds

Aesthetic

The 20mm Blue Metal Aggregate comes in a striking deep blue-grey hue, which adds charm and elegance to your outdoor spaces and suits multiple garden styles. Whether you’re renovating a garden pathway, constructing a new driveway, or working on a larger commercial landscaping project, our 20mm Blue Metal aggregate is an ideal choice.

Common questions about 20mm Blue Metal

Is 20mm blue metal good for driveways?

Yes. It is durable under vehicles and drains well. Lay it over a compacted road base with firm edging so it doesn’t spread.

Does 20mm blue metal help with drainage?

Yes. The gaps between stones let water move freely, helping prevent waterlogging and soil erosion.

How much 20mm blue metal do I need?

One cubic metre covers about 13–20 m² at 50–75mm deep.

Compare with

20mm Recycled Concrete

Recycled concrete graded to 20mm for drainage, driveways and sub-base work. Sustainable, stable and economical.

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